Choose the most suitable option to replace the highlighted part of the sentence: She insisted that she comes with us.

Correct — B. The trigger is insisted that. Here insist means demand: she wants to come along.

After insist, demand or suggest used this way, the that-clause takes should + base form or the bare base form: 'that she should come', 'that she come'.

'Comes' is an ordinary present tense, so it has to go. 'She insisted that she should come with us' → option (b).

Why the others are wrong

• (a)
  came with us — Came turns the demand into a claim about the past, that she had come along. The original 'comes' points to her joining us, which needs the demand form.
• (c)
  is coming with us — Is coming keeps an ordinary present after past insisted and reports a plan as a fact. A demand after insist takes should + base form.
• (d)
  has to come with us — Has to adds an outside obligation, as if a rule forced her, and its present tense clashes with past insisted. The demand is hers.

Some verbs of demanding and proposing, among them insist, demand, suggest, recommend, take a that-clause whose verb stays in the base form: 'They demanded that he leave.'

The same demand can be written with should: 'They demanded that he should leave.' Both forms are standard, and neither changes for tense or person.

That is why 'she comes' fails: the -s ending and the present tense belong to an ordinary statement, not a demand.

Key facts

• After insist, demand, suggest or recommend in the sense of requiring an action, the that-clause verb is the base form or should + base form.
• The base form never takes -s: 'that she come', not 'that she comes'.
• When insist means 'firmly claim', an ordinary tense follows: 'She insisted that she had locked the door'.

Common traps

• Choosing 'came' by backshifting after past insisted, as if the clause were reported speech.
• Reading 'has to' as a polite version of should, when it adds an outside obligation.

No directly related past PYQ was found.